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-rw-r--r--src/mga_arc.c225
1 files changed, 225 insertions, 0 deletions
diff --git a/src/mga_arc.c b/src/mga_arc.c
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+++ b/src/mga_arc.c
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+/************************************************************
+
+Copyright 1989, 1998 The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of The Open Group shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from The Open Group.
+
+********************************************************/
+/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/mga/mga_arc.c,v 1.10 2001/12/14 19:59:51 dawes Exp $ */
+
+
+#include "X.h"
+#include "gcstruct.h"
+#include "windowstr.h"
+#include "pixmapstr.h"
+#include "regionstr.h"
+#include "Xprotostr.h"
+#include "miscstruct.h"
+#include "mizerarc.h"
+#include "mi.h"
+#include "scrnintstr.h"
+#include "xaa.h"
+#include "xaalocal.h"
+#include "xf86.h"
+#include "xf86_OSproc.h"
+#include "xf86_ansic.h"
+
+#include "xf86Pci.h"
+
+#include "mga_bios.h"
+#include "mga.h"
+#include "mga_reg.h"
+#include "mga_macros.h"
+
+
+/*
+ This is only faster than cfb for stuff other than GXcopy.
+ And even then, only when pci_retries are on.
+*/
+
+
+#define DRAW_POINT(x, y) { \
+ tmp = x; \
+ OUTREG(MGAREG_FXBNDRY, (tmp) | (((tmp) + 1) << 16)); \
+ OUTREG(MGAREG_YDSTLEN + MGAREG_EXEC, ((y) << 16) | 1); \
+}
+
+static void
+MGAZeroArc(
+ DrawablePtr pDraw,
+ GCPtr pGC,
+ xArc *arc
+){
+ int yoffset, dyoffset, x, y, a, b, d, mask, k1, k3, dx, dy, tmp;
+ XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_GC(pGC);
+ MGAPtr pMga = MGAPTR(infoRec->pScrn);
+ miZeroArcRec info;
+ Bool do360;
+ DDXPointRec org, orgo;
+
+ CHECK_DMA_QUIESCENT( pMga, infoRec->pScrn );
+
+ (*infoRec->SetupForSolidFill)(infoRec->pScrn, pGC->fgPixel,
+ pGC->alu, pGC->planemask);
+
+ do360 = miZeroArcSetup(arc, &info, TRUE);
+ org.y = info.yorg + pDraw->y;
+ org.x = 0;
+ orgo.y = info.yorgo + pDraw->y;
+ orgo.x = 0;
+ info.xorg += pDraw->x;
+ info.xorgo += pDraw->x;
+
+ MIARCSETUP();
+ yoffset = y ? 1 : 0;
+ dyoffset = 0;
+ mask = info.initialMask;
+ if (!(arc->width & 1)) {
+ WAITFIFO(4);
+ if (mask & 2)
+ DRAW_POINT(info.xorgo, org.y);
+ if (mask & 8)
+ DRAW_POINT(info.xorgo, orgo.y);
+ }
+ if (!info.end.x || !info.end.y) {
+ mask = info.end.mask;
+ info.end = info.altend;
+ }
+ if (do360 && (arc->width == arc->height) && !(arc->width & 1)) {
+ int xoffset = 1;
+ DDXPointRec orghb, orgohb;
+
+ orghb.y = org.y + info.h;
+ orghb.x = org.x + info.xorg;
+ orgohb.y = orghb.y;
+ orgohb.x = orghb.x - info.h;
+
+ org.x += info.xorg;
+ orgo.x += info.xorg;
+ orghb.x += info.h;
+ while (1) {
+ WAITFIFO(16);
+ DRAW_POINT(org.x + x, org.y + yoffset);
+ DRAW_POINT(org.x - x, org.y + yoffset);
+ DRAW_POINT(orgo.x - x, orgo.y - yoffset);
+ DRAW_POINT(orgo.x + x, orgo.y - yoffset);
+ if (a < 0) break;
+ DRAW_POINT(orghb.x - y, orghb.y - xoffset);
+ DRAW_POINT(orgohb.x + y, orgohb.y - xoffset);
+ DRAW_POINT(orgohb.x + y, orgohb.y + xoffset);
+ DRAW_POINT(orghb.x - y, orghb.y + xoffset);
+ xoffset ++;
+ MIARCCIRCLESTEP(yoffset ++;);
+ }
+ org.x -= info.xorg;
+ orgo.x -= info.xorg;
+ x = info.w;
+ yoffset = info.h;
+ }
+ else if (do360) {
+ while (y < info.h || x < info.w) {
+ MIARCOCTANTSHIFT(dyoffset = 1;);
+ WAITFIFO(8);
+ DRAW_POINT(org.x + info.xorg + x, org.y + yoffset);
+ DRAW_POINT(org.x + info.xorgo - x, org.y + yoffset);
+ DRAW_POINT(orgo.x + info.xorgo - x, orgo.y - yoffset);
+ DRAW_POINT(orgo.x + info.xorg + x, orgo.y - yoffset);
+ MIARCSTEP(yoffset += dyoffset;, yoffset++;);
+ }
+ }
+ else {
+ while (y < info.h || x < info.w) {
+ MIARCOCTANTSHIFT(dyoffset = 1;);
+ if ((x == info.start.x) || (y == info.start.y)) {
+ mask = info.start.mask;
+ info.start = info.altstart;
+ }
+ WAITFIFO(8);
+ if (mask & 1)
+ DRAW_POINT(org.x + info.xorg + x, org.y + yoffset);
+ if (mask & 2)
+ DRAW_POINT(org.x + info.xorgo - x, org.y + yoffset);
+ if (mask & 4)
+ DRAW_POINT(orgo.x + info.xorgo - x, orgo.y - yoffset);
+ if (mask & 8)
+ DRAW_POINT(orgo.x + info.xorg + x, orgo.y - yoffset);
+ if ((x == info.end.x) || (y == info.end.y)) {
+ mask = info.end.mask;
+ info.end = info.altend;
+ }
+ MIARCSTEP(yoffset += dyoffset;, yoffset++;);
+ }
+ }
+ if ((x == info.start.x) || (y == info.start.y))
+ mask = info.start.mask;
+
+ WAITFIFO(4);
+ if (mask & 1)
+ DRAW_POINT(org.x + info.xorg + x, org.y + yoffset);
+ if (mask & 4)
+ DRAW_POINT(orgo.x + info.xorgo - x, orgo.y - yoffset);
+ if (arc->height & 1) {
+ WAITFIFO(4);
+ if (mask & 2)
+ DRAW_POINT(org.x + info.xorgo - x, org.y + yoffset);
+ if (mask & 8)
+ DRAW_POINT(orgo.x + info.xorg + x, orgo.y - yoffset);
+ }
+
+ SET_SYNC_FLAG(infoRec);
+}
+
+void
+MGAPolyArcThinSolid (
+ DrawablePtr pDraw,
+ GCPtr pGC,
+ int narcs,
+ xArc *parcs
+){
+ xArc *arc;
+ BoxRec box;
+ int i, x2, y2;
+ RegionPtr cclip;
+
+ cclip = pGC->pCompositeClip;
+
+ if(!REGION_NUM_RECTS(cclip))
+ return;
+
+ for (arc = parcs, i = narcs; --i >= 0; arc++) {
+ if (miCanZeroArc(arc)) {
+ box.x1 = arc->x + pDraw->x;
+ box.y1 = arc->y + pDraw->y;
+ x2 = box.x1 + (int)arc->width + 1;
+ box.x2 = x2;
+ y2 = box.y1 + (int)arc->height + 1;
+ box.y2 = y2;
+ if ( (x2 <= MAXSHORT) && (y2 <= MAXSHORT) &&
+ (RECT_IN_REGION(pDraw->pScreen, cclip, &box) == rgnIN) )
+ MGAZeroArc (pDraw, pGC, arc);
+ else
+ miZeroPolyArc(pDraw, pGC, 1, arc);
+ }
+ else
+ miPolyArc(pDraw, pGC, 1, arc);
+ }
+}
+
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